Pauli expresses his enthusiasm over Dirac's Bakerian lecture and makes several comments on it.

Pauli writes about longitudinal photons. The principle of "renormalization" of charge and mass works satisfactorily only in special interactions. Another question: will it be necessary to modify the space-time concept for small dimensions?

Pauli makes further critical remarks about Jordan's cosmology. He writes that some of his assumption should be derived mathematically from a new nuclear theory.

Pauli replies to a letter by Landé criticizing a theory which he develops.

Pauli reports on exchanges with Einstein and Baade on relativity. He suggests topics, participants and scope of the Bern relativity congress, 1955.

Pauli reports on the congress in Rochester. He writes about his discussion with Fermi about the neutrino experiments. He writes also on a talk about a new paper by Feynman.

Pauli writes more about Feynman's paper. He talks about his difficulties to dealing with many excitons.

Pauli writes about Delbrück's reaction to Bohr's letter on biology and physics. He is against the orthodox belief that classical genetics and chance selection alone can explain biological evolution. Pauli writes about an illustration by J Neumann describing the attitude of orthodox biologists. He writes about Oppenheimer's View.